fig2

Figure 2. Laser-free UTEM. (A) Laser-free UTEM by integrating ultrafast RF pulser into a TEM. Main column elements of the RF pulser: kickers (K1, K2) and aperture as shown in the inset. Reprinted with permission^[14]. Copyright 2020, AAAS. (B) Reconstructed electromagnetic wave propagation dynamics in two interdigitated combs. Reprinted with permission^[14]. Copyright 2020, AAAS. (C) Laser-free UTEM based on a delay line detector. Reprinted with permission^[15]. (C) is reproduced under the CC BY-NC-ND license. Copyright 2022, Elsevier. (D) Snapshots of magnetic vortex core motion recorded at different time steps over a 13 ps interval during excitation at 417 MHz under an 18 mT static out-of-plane applied magnetic field. The images reveal clockwise motion of the magnetic vortex core. Reprinted with permission^[15]. Copyright 2022, Elsevier.